CN110535449B - Constant-resistance short-wave multiplexer - Google Patents
Constant-resistance short-wave multiplexer Download PDFInfo
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- CN110535449B CN110535449B CN201910666746.9A CN201910666746A CN110535449B CN 110535449 B CN110535449 B CN 110535449B CN 201910666746 A CN201910666746 A CN 201910666746A CN 110535449 B CN110535449 B CN 110535449B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a constant-resistance short wave multiplexer which comprises an antenna port, a 0-degree phase shift module and at least two output ports. In addition, the multiplexer has two basic output channels, each of which is connected between a 0 degree phase shift module and one output port and includes a lumped parameter fabricated LC short wave filter. The constant-impedance short-wave multiplexer also has at least two impedance matching networks constructed and arranged to be connected between the two output channels, matching the out-of-band impedance of the short-wave filters of the two connected output channels such that the standing wave ratio of the antenna port (ANT) is less than 2.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a constant-resistance shortwave multiplexer.
Background
With the rapid development of wireless communication technology, high-performance short-wave communication receiver and transmitter systems are receiving more and more attention, and have wide application space in the field of army and civilian, and the short-wave communication receiver and transmitter not only have high-sensitivity and high-linearity performance indexes, but also have increasingly improved requirements on the broadband of the receiver and the transmitter. Particularly, in the trend of using the radio frequency direct sampling technology as the next generation digital short wave communication technology, the anti-interference capability and the ultra-high sensitivity of the receiver are a pair of mutually restricted technical indexes, and how to obtain the balance points of the anti-interference capability and the ultra-high sensitivity so as to furthest exert the comprehensive performance of the receiver becomes the focus of attention in the industry. As can be seen, short wave broadband receivers face several technical challenges due to the large instantaneous bandwidth:
1) Solving the difficult problem of larger dynamic range;
2) Solving the difficult problem of higher sensitivity;
3) Improving the problem of intermodulation products;
the current methods for solving the problems mainly comprise the following steps:
1) Using a multiband bandpass filter;
2) Using a multi-stage high-low pass filter combination;
3) Using a power divider;
although methods 1 and 2 can improve intermodulation products of the receiver and achieve a larger dynamic range, the instantaneous operating bandwidth of the receiver is limited by the bandwidth of the filter by implementing multi-channel switching through switching. The method 3 can solve the problem of instantaneous bandwidth of the receiver, however, the loss of the power divider increases the noise coefficient of the receiver and reduces the sensitivity of the communication system. All three solutions have significant technical drawbacks and correspondingly reduce the receiver performance index.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the constant-resistance short wave multiplexer, which can provide good low loss during the preselection of radio frequency signals, provide very low noise coefficient, provide good out-of-band second-order cut-off point, keep good linearity, and provide standing wave ratio smaller than 2 in the radio frequency range for the public input port of the constant-resistance short wave multiplexer to absorb radio frequency stray interference.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
a constant-resistance short-wave multiplexer, comprising:
an antenna port for connecting the multiplexer to an antenna;
a 0 degree phase shift module for connecting the two basic output channels;
at least two output ports;
two basic output channels, each of which is connected between the 0 degree phase shift module and the output port and comprises an output shortwave filter and an impedance matching network;
and the at least two impedance matching networks enable out-of-band signals reflected by the output short wave filter to be absorbed into the impedance matching networks, namely the standing wave ratio of S11 outputted by the antenna port in the whole short wave frequency band is constantly smaller than 2, namely the out-of-band signal reflection of the output short wave filter is reduced or eliminated.
Furthermore, the 0-degree phase shift module is connected between the antenna port and two basic output channels, and the input signals of the two basic output channels have the same phase and the same amplitude.
Further, the basic output channel is directly connected to a 0 degree phase shift module.
Further, the impedance matching network is connected between the two output channels, so that the out-of-band impedance between the output channel and the connected output channel is matched, i.e. the S11 standing wave ratio at the antenna port is constantly smaller than 2.
Further, the impedance matching network is provided with at least one parallel resonance branch, a series resonance branch cascaded with the parallel resonance branch and a separate connection inductance.
Further, the impedance matching network is provided with at least one parallel resonance branch, a series resonance branch cascaded with the parallel resonance branch, a separate connection inductance and a grounding resistance.
Further, the output channels of the constant-resistance short-wave multiplexer comprise two basic output channels and at least 0 common output channels.
Further, the S11 standing wave ratio at the antenna port is constantly smaller than 2 in the radio frequency range.
Further, the method comprises the steps of, wherein the multiplexer is a constant-resistance short-wave duplexer or a constant-resistance short-wave triplexer or a constant-resistance short-wave quadruplex or a constant-resistance short-wave triplexer the constant-resistance short-wave power amplifier comprises a resistance short-wave seven-power amplifier, a constant-resistance short-wave eight-power amplifier, a constant-resistance short-wave nine-power amplifier, a constant-resistance short-wave ten-power amplifier, a constant-resistance short-wave eleven-power amplifier and a constant-resistance short-wave twelve-power amplifier.
Compared with the prior art, the invention has the beneficial effects that:
the invention has the beneficial effects that:
1) Minimum insertion loss can be achieved;
2) Seamless coverage of short-wave frequency band signals can be realized, and the contradiction between 30MHz instantaneous bandwidth and parameters such as loss, anti-interference, intermodulation and the like in a short-wave communication system is solved;
3) The standing wave ratio of the public input port can be enabled to be constantly smaller than 2;
4) The mutual independence of the debugging work among all channels can be realized, and the debugging difficulty is reduced;
5) The method can realize the independence of modular installation and unloading of each channel, and can adjust the channel number of the multiplexer at any time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a constant-resistance short-wave multiplexer provided by the invention;
fig. 2 is a circuit diagram of a first embodiment of an impedance matching module of a constant-impedance short-wave multiplexer according to the present invention;
FIG. 3 is a circuit diagram of a second embodiment of an impedance matching module of the constant-impedance short-wave multiplexer according to the present invention;
FIG. 4 is a circuit diagram of a 0 degree phase shift module of the constant-resistance short-wave multiplexer provided by the invention;
FIG. 5 is a diagram showing a spectral response of a first embodiment of a constant-impedance short-wave multiplexer according to the present invention;
FIG. 6 is a graph of the input impedance smith of a first embodiment of a constant-impedance short-wave multiplexer according to the present invention;
FIG. 7 is a circuit diagram of a second embodiment of the constant-resistance short-wave multiplexer provided by the invention;
FIG. 8 is a graph of the input impedance smith of a second embodiment of a constant-impedance short-wave multiplexer according to the present invention;
fig. 9 is a spectrum response diagram of a second embodiment of the constant-resistance short-wave multiplexer provided by the present invention.
In the figure: 1. a common input port, a 2.0 degree phase shift module, a 3 third channel filter receiving module, a 4 first channel filter receiving module, a 5 third impedance matching module, a 6 first impedance matching module, a 7 third receiving port, a 8 fourth channel filter receiving module, a 9 fourth receiving port, a 10 second channel filter receiving module, a 11 second receiving port, a 12 second impedance matching module, a 13 fourth impedance matching module, a 14 first channel module, a 15 second channel module, a 16 third channel module, a 17 fourth channel module, a 18 first receiving port, a 19 first inductor, a 20 first capacitor, the third inductor, 22, second capacitor, 23, first ground, 24, second inductor, 25, first input terminal, 26, first output terminal, 27, second input terminal, 28, fourth inductor, 29, third capacitor, 30, fifth inductor, 31, fourth capacitor, 32, second ground, 33, sixth inductor, 34, first resistor, 35, third ground, 36, ninth inductor, 37, seventh inductor, 38, eighth inductor, 39, third input terminal, 40, fifth capacitor, 41, sixth capacitor, 42, second resistor, 43, second output terminal, 44, third output terminal, 45, seventh capacitor, 46, eighth capacitor, 47, fifth path.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
According to an embodiment of the invention, a constant-resistance short-wave multiplexer comprises:
an antenna port (ANT) for connecting the multiplexer to an antenna;
a 0 degree phase shift module (PS) for connecting the two basic output channels;
at least two output ports RxP;
two basic output channels, each basic output channel (Bx) being connected between the 0 degree phase shift module (PS) and the output port RxP and comprising an output short wave FILTER (FILTER) and an impedance matching network;
at least two impedance matching networks (DG) which are constructed and arranged in such a way that out-of-band signals reflected by the output short-wave FILTER (FILTER) are absorbed into the impedance matching networks, i.e. that the standing wave ratio of S11 at the antenna port (ANT) is constantly less than 2 over the entire short-wave band, i.e. that the out-of-band signal reflection of the output short-wave FILTER (FILTER) is reduced or eliminated.
In a specific embodiment of the present invention, the 0 degree phase shift module (PS) is connected between the antenna port (ANT) and the two basic output channels (Bx), i.e. the input signals of the two basic output channels (Bx) have the same phase and the same amplitude.
In one embodiment of the invention, the basic-type output channel (Bx) is directly connected to a 0-degree phase shift module (PS).
In a specific embodiment of the invention, the impedance matching network (DG) is connected between the two output channels, which is configured such that the out-of-band impedance between the present output channel and the connected output channel is matched, i.e. such that the S11 standing wave ratio at the antenna port (ANT) is constantly less than 2.
In a specific embodiment of the invention, the impedance matching network (DG) has at least one parallel resonant branch and a series resonant branch cascaded with the parallel resonant branch, a separate connection inductance.
In a specific embodiment of the invention, the impedance matching network (DG) has at least one parallel resonant branch and a series resonant branch cascaded with the parallel resonant branch, a separate connection inductance, a ground resistance.
In a specific embodiment of the present invention, the output channels of the constant-resistance short-wave multiplexer include two basic output channels and at least 0 common output channels.
In a specific embodiment of the invention, the S11 standing wave ratio at the antenna port (ANT) is constantly less than 2 in the radio frequency range.
In one embodiment of the present invention, wherein the multiplexer is a constant-resistance short-wave duplexer or a constant-resistance short-wave triplexer or a constant-resistance short-wave quadruplex or a constant-resistance short-wave triplexer the constant-resistance short-wave power amplifier comprises a resistance short-wave seven-power amplifier, a constant-resistance short-wave eight-power amplifier, a constant-resistance short-wave nine-power amplifier, a constant-resistance short-wave ten-power amplifier, a constant-resistance short-wave eleven-power amplifier and a constant-resistance short-wave twelve-power amplifier.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes the above technical solutions of the present invention in detail by a specific usage manner.
In specific use, according to the constant-resistance short-wave multiplexer of the present invention, fig. 1 shows a block diagram of the multiplexer provided by the present invention. As shown in fig. 1, the input port of the 0-degree phase shift module 2 is connected to a common input port 1. The first channel module 14 is connected between the 0 degree phase shift module 2, the first receiving port 18 and the second channel module 15. The first channel module 14 includes a first channel filter receiving module 4 and a first impedance matching module 6. Wherein the first channel filter receiving module 4 of the first channel module 14 is connected between the 0 degree phase shift module 2 and the first receiving port 18; the first impedance matching module 6 of the first channel module 14 is connected between the 0 degree phase shift module 2 and the second channel module 15.
The second channel module 15 includes the second channel filter receiving module 10 and the second impedance matching module 12. Wherein the second channel filter receiving module 10 of the second channel module 15 is connected between the first impedance matching module 6 of the first channel module 14 and the second receiving port 11; the second impedance matching module 12 of the second channel module 15 is connected after the first impedance matching module 6 of the first channel module 14.
The third channel module 16 includes a third channel filter receiving module 3 and a third impedance matching module 5. Wherein the third channel filtering receiving module 3 of the third channel module 16 is connected between the 0 degree phase shifting module 2 and the third receiving port 7; the third impedance matching module 5 of the third channel module 16 is connected between the 0 degree phase shift module 2 and the fourth channel module 17.
The fourth channel module 17 includes a fourth channel filter receiving module 8 and a fourth impedance matching module 13. Wherein the fourth channel filter receiving module 8 of the fourth channel module 17 is connected between the third impedance matching module 5 of the third channel module 16 and the fourth receiving port 9; the fourth impedance matching block 13 of the fourth channel block 17 is connected after the third impedance matching block 5 of the third channel block 16.
In the embodiment of the present invention, the received signal generates a first path of receiving paths through the common input port 1, the 0-degree phase shift module 2, the first channel filtering receiving module 4 and the first receiving port 18. The received signal passes through the common input port 1, the 0-degree phase shift module 2, the first impedance matching module 6, the second channel filtering receiving module 10 and the second receiving port 11 to generate a second channel receiving path. The received signal passes through the common input port 1, the 0-degree phase shift module 2, the third channel filtering receiving module 3 and the third receiving port 7 to generate a third receiving channel. The received signal passes through the common input port 1, the 0-degree phase shift module 2, the third impedance matching module 5, the fourth filtering receiving module 8 and the fourth receiving port 9 to generate a fourth path of receiving path.
In the embodiment of the present invention, one end of the first impedance matching module 6 is connected to the 0 degree phase shift module 2, and the other end is connected to the second channel filtering receiving module 10 of the second channel module 15, so as to realize the channel independence and isolation between the first channel module 14 and the second channel module 15, and the circuit of the second channel module 15 is changed without affecting the performance of the first channel module 14.
In the embodiment of the present invention, one end of the 0 degree phase shift module 2 is connected to the common input port 1, and the other two interfaces are respectively connected to the first channel module 14 and the third channel module 16, so as to reduce the insertion loss of the multiplexer and realize the continuous working frequency band of the multiplexer.
In the embodiment of the present invention, one end of the 0 degree phase shift module 2 is connected to the common input port 1, and the other two interfaces are respectively connected to the first channel module 14 and the third channel module 16, so as to reduce the insertion loss of the multiplexer and realize the continuous working frequency band of the multiplexer.
The third channel filtering receiving module 3 may be a lumped parameter filter with elliptic function response, or may be a lumped parameter filter with chebyshev function response.
The first channel filtering receiving module 4 may be a lumped parameter filter with an elliptic function response, or may be a lumped parameter filter with a chebyshev function response.
The fourth filtering receiving module 8 may be a lumped parameter filter with an elliptic function response, or may be a lumped parameter filter with a chebyshev function response.
The second channel filtering receiving module 10 may be a lumped parameter filter with an elliptic function response, or may be a lumped parameter filter with a chebyshev function response.
Fig. 2 shows a circuit diagram of a first embodiment of an impedance matching module. As shown in fig. 2, the first input terminal 25 of the first impedance matching module 6 is connected to the output end of the 0 degree phase shift module 2, the inductance value L19 of the first inductor 19 and the capacitance value C20 of the first capacitor 20 are determined according to the following formula, fs is the center frequency of the operation of the first channel module 14, the second capacitor 22 is connected to the first ground 23, the first inductor 19 is connected to the second inductor 24 and the third inductor 21 after being connected in parallel with the first capacitor 20, and the second inductor 24 is connected to the first output terminal 26.
The inductance value L21 of the third inductor 21 and the capacitance value C22 of the second capacitor 22 are determined according to the following formula, fs being the center frequency of operation of the first channel module 14.
The first output terminal 26 is connected to the second channel filter receiving module 10 of the second channel module 15 and the second impedance matching module 12.
Fig. 3 shows a circuit diagram of a second embodiment of an impedance matching module. As shown in fig. 3, the second input terminal 27 of the second impedance matching module 12 is connected to the first output terminal 26 of the first impedance matching module 6, the fourth inductor 28 is connected in parallel with the third capacitor 29 and then connected to the fifth inductor 30 and the sixth inductor 33,
the fourth capacitor 31 is connected to the second ground 32, the sixth inductor 33 is connected to a first resistor 34 of 50 ohms, and the first resistor 34 of 50 ohms is connected to a third ground 35. The second ground 32 and the third ground 35 are both the same ground.
Fig. 4 is a circuit diagram of a 0 degree phase shift module of the constant-resistance short-wave multiplexer provided by the invention. The third input terminal 39 is connected to the common input port 1, the second output terminal 43 is connected to said third channel module 16, and the third output terminal 44 is connected to said first channel module 14. The 0 degree phase shift module 2 controls the insertion loss through the second resistor 42, and the seventh inductor 37, the eighth inductor 38, the ninth inductor 36, the fifth capacitor 40, the sixth capacitor 41, the seventh capacitor 45, and the eighth capacitor 46 control the frequency response characteristic of the 0 degree phase shift module 2.
Fig. 5 shows a spectral response diagram of a first embodiment of a constant-resistance short-wave multiplexer. The lower limit frequency of the working frequency of the first channel module 14 is f1, and the upper limit frequency of the working frequency of the first channel module 14 is f4; the lower limit frequency of the working frequency of the second channel module 15 is f3, and the upper limit frequency of the working frequency of the second channel module 15 is f7; the lower limit frequency of the operating frequency of the third channel module 16 is f2, and the upper limit frequency of the operating frequency of the third channel module 16 is f6; the lower limit frequency of the operating frequency of the fourth channel module 17 is f5, and the upper limit frequency of the operating frequency of the fourth channel module 17 is f8. The frequency response curves of all channels are round and smooth, and have no burrs.
Fig. 6 shows a plot of the input impedance smith of a first embodiment of a constant-impedance short-wave multiplexer. An input impedance smith chart at the common input port 1.
Fig. 7 shows a circuit diagram of a second embodiment of a constant-resistance short-wave multiplexer. Unlike the embodiment shown in fig. 1, the fifth channel 47 is free of impedance matching modules.
Fig. 8 shows a plot of the input impedance smith of a second embodiment of a constant-impedance short-wave multiplexer. Unlike the embodiment shown in fig. 6, the fifth channel 47 does not have an impedance matching block, and the plot of the input impedance smith at the common input port 1 of the second embodiment diverges from the plot of the input impedance smith at the common input port 1 of the first embodiment.
Fig. 9 shows a spectral response diagram of a second embodiment of a constant-impedance short-wave multiplexer. The fifth channel 47 is free of impedance matching modules, the frequency response curve of the channel is affected by the filter modules of the fifth channel 47, and the edges of the pass band have large fluctuation.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. A constant-resistance short-wave multiplexer, comprising:
an antenna port for connecting the multiplexer to an antenna;
the 0-degree phase shift module is used for connecting two basic output channels, the 0-degree phase shift module comprises a seventh inductor, an eighth inductor and a ninth inductor, the first connecting end of the seventh inductor, the first connecting end of the eighth inductor and the first connecting end of the ninth inductor are connected with each other, the fifth capacitor is connected with the first connecting end of the seventh inductor, the sixth capacitor is connected with the first connecting end of the eighth inductor, the seventh capacitor is connected with the second connecting end of the seventh inductor, the eighth capacitor is connected with the second connecting end of the eighth inductor, and a second resistor is connected between the second connecting end of the seventh inductor and the second connecting end of the eighth inductor;
at least two output ports;
two basic output channels, each of which is connected between the 0 degree phase shift module and the output port, each of which includes an output short wave filter;
and the at least two impedance matching networks enable out-of-band signals reflected by the output short wave filter to be absorbed into the impedance matching networks, the standing wave ratio of S11 at the antenna port in the whole short wave frequency band is constantly less than 2, and the out-of-band signal reflection of the output short wave filter is reduced or eliminated.
2. The constant-resistance short-wave multiplexer according to claim 1, wherein: the 0-degree phase shift module is connected between the antenna port and two basic output channels, and the input signals of the two basic output channels have the same phase and the same amplitude.
3. The constant-resistance short-wave multiplexer according to claim 1, wherein: the basic output channel is directly connected to a 0 degree phase shift module.
4. The constant-resistance short-wave multiplexer according to claim 1, wherein: the impedance matching network is connected between the two basic output channels, so that the out-of-band impedance between the basic output channel and the connected basic output channel is matched, namely the S11 standing wave ratio at the antenna port is constantly less than 2.
5. The constant-resistance short-wave multiplexer according to claim 4, wherein: the impedance matching network has at least one parallel resonant branch and a series resonant branch cascaded with the parallel resonant branch, the individual connection inductances.
6. The constant-resistance short-wave multiplexer according to claim 5, wherein: the impedance matching network is provided with at least one parallel resonance branch, a series resonance branch cascaded with the parallel resonance branch, a separate connection inductance and a grounding resistance.
7. The constant-resistance short-wave multiplexer according to claim 6, wherein: the output channels of the constant-resistance short-wave multiplexer comprise two basic output channels and at least 0 common output channels.
8. The constant-resistance short-wave multiplexer according to claim 7, wherein: the S11 standing wave ratio at the antenna port is constantly less than 2 in the radio frequency range.
9. The constant-resistance short-wave multiplexer according to any one of claims 1-8, wherein: wherein the multiplexer is one of the following: constant-resistance short-wave duplexer, constant-resistance short-wave triplexer, constant-resistance short-wave quadruplex, constant-resistance short-wave triplexer constant-resistance short-wave eight-worker device, constant-resistance short-wave nine-worker device, constant-resistance short-wave ten-worker device, constant-resistance short-wave eleven-worker device and constant-resistance short-wave twelve-worker device.
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| DE102015108511B3 (en) * | 2015-05-29 | 2016-09-22 | Epcos Ag | multiplexer |
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| WO2018212025A1 (en) * | 2017-05-16 | 2018-11-22 | 株式会社村田製作所 | Multiplexer, transmission device and reception device |
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